Why does my car stall when Maf Unplugged?
So my thinking is that the missing signal from the MAF is keeping the ECU from using input from the actual failing sensor, ll. For some reason the ECU does not recognize the failed part as bad. Apparently not a condition the were testing or expecting. helpful?
What to do when Maf is Unplugged in car?
You can try re-setting the Engine control Module by dis-connecting the battery. That may baseline the ECM, MAF and Fuel Pressure Sensor. You might also test the fuel pressure manually with a gauge. I could not find a position for a test port, but you can usually find one on the fuel rail.
What causes a car to stall with too much air?
This throws off the expected air fuel ratio and causes the vehicle to run lean. If you have a bad vacuum leak, the air fuel ratio will end up being way too lean (too much air) which could cause the vehicle to stall.
What should I do if my car stalls after starting?
But, that should pull a code. You can try re-setting the Engine control Module by dis-connecting the battery. That may baseline the ECM, MAF and Fuel Pressure Sensor. You might also test the fuel pressure manually with a gauge. I could not find a position for a test port, but you can usually find one on the fuel rail.
So my thinking is that the missing signal from the MAF is keeping the ECU from using input from the actual failing sensor, ll. For some reason the ECU does not recognize the failed part as bad. Apparently not a condition the were testing or expecting. helpful?
Can a car run with a bad MAF?
So, in this case, the PCM uses the input from the Throttle Position Sensor (TPS) modified by the ECT and ACT signals to calculate a substitute value for load on a real-time basis. So, YES, the EEC-IV engine control system in our cars is DESIGNED to allow the engine to continue to run with a bad sensor, including the MAF.
What happens if the MAF is unplugged?
It will also turn on the check engine light to indicate a sensor is bad. The case of a disconnected, or just bad, MAF is a little bit different but not much. The MAF provides a very accurate indication of engine load to the PCM. If its input is out of range or not present, the PCM needs a substitute indication of load in order to keep running.
What causes no check engine light with MAF plugged in?
I failed to mention no check engine light with MAF plugged in and no engine codes in the ECU. have the same problem? I would say that the camshaft and /or crankshaft position sensors could be failing and the timing is off causing flooding from the timing be so far off. But, that should pull a code.